Electrical and optical properties of carbon nanotube/polypyrrole addressable intra-connects

• Published in: Synthetic metals Vol. 159; no. 5; pp. 462 - 466
• Main Authors: Lee, Seon Woo, Grebel, Haim, Kornblit, Avi, Lopez, Daniel
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-03-2009; Elsevier
• Subjects: Applied sciences; Carbon nanotube intra-connects; Composites; Electrochemical polymerization; Exact sciences and technology; Forms of application and semi-finished materials; Polymer industry, paints, wood; Polypyrrole; Technology of polymers; Carbon nanotube intra-connects; Electrochemical polymerization; Polypyrrole; Electrical properties; Voltage current curve; Carbon nanotubes; Experimental study; Glow discharge polymerization; Conducting polymers; Ultraviolet radiation; Preparation; Size effect; Radiation effect; Pyrrole polymer
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2008.11.015

Carbon nanotube (CNT) intra-connects (bridges spanning across in-plane electrodes) were electroplated with polypyrrole (PPy), an electrically conductive polymer (ECP). Sharp metal electrodes initiated the CNT growth at pre-selected locations. The CNT bridge was then used as an electrode for conductive polymer electro-deposition. The samples were characterized by Raman spectroscopy and current–voltage measurements. We found that current–gate voltage (
I
ds–
V
gs) characteristics changed dramatically for the electroplated structures when the polymer exceeded a threshold thickness, in the order of 80
nm. In addition, the CNT/PPy structures exhibited large sensitivity to UV radiation: the current substantially reduced upon irradiation with moderate UV intensity values.